light 18/6 foxfarm nutes used only once t5new wave lighting system water every two to thre days,usin 4 4' tl5ho/54w/865 halide 650 and a fan runing just to keep air moving temps at hottest 90to92 lowest ive seen 72 it about 6'wide x 6' high x2 1/2' deep.i keep a cup of water to evaporate in air